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Question
How will you convert ethanal into the following compound?
But-2-enoic acid
Solution
\[\ce{\underset{Ethanal}{2CH3CHO}->[dil.NaOH][Aldol condensation ]\underset{but-2-enal}{CH3CH = CHCHO}->[Ag(NH3)^+2OH-][Tollens' reagent]\underset{But-2-enoic acid}{CH3CH = CHCO2H}}\]
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